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Eurographics Symposium on Virtual Environments (2004) S. Coquillart, M. Gbel (Editors)

Summary: Eurographics Symposium on Virtual Environments (2004)
S. Coquillart, M. Göbel (Editors)
Using Saccadic Suppression to Hide Graphic Updates
J. Schumacher1,2
and R. S. Allison1
and R. Herpers1,2
1Centre for Vision Research, Department of Computer Science and Engineering, York University, Toronto, Canada
2 Department of Computer Science, Bonn-Rhein-Sieg University of Applied Sciences, Sankt Augustin, Germany
In interactive graphics it is often necessary to introduce large changes in the image in response to updated in-
formation about the state of the system. Updating the local state immediately would lead to a sudden transient
change in the image, which could be perceptually disruptive. However, introducing the correction gradually using
smoothing operations increases latency and degrades precision. It would be beneficial to be able to introduce
graphic updates immediately if they were not perceptible. In the paper the use of saccade-contingent updates is
exploited to hide graphic updates during the period of visual suppression that accompanies a rapid, or saccadic,
eye movement.
Sensitivity to many visual stimuli is known to be reduced during a change in fixation compared to when the eye
is still. For example, motion of a small object is harder to detect during a rapid eye movement (saccade) than
during a fixation. To evaluate if these findings generalize to large scene changes in a virtual environment, gaze
behavior in a 180 degree hemispherical display was recorded and analyzed. This data was used to develop a


Source: Allison, Robert - Department of Computer Science, York University (Toronto)


Collections: Computer Technologies and Information Sciences; Biology and Medicine